SU1761695A1 - Equipment for sheet glass sagging - Google Patents

Abstract

SUMMARY OF THE INVENTION: The successively located heating, prayer and annealing chambers are designed in such a way that the highlighting chamber represents a horizontal channel connecting the upper ends of the vertical shafts, in the form of which the heating and annealing chambers are made. This design contributes to the accumulation of heat in the horizontal grinding channel. In the vertical heating channel, the intensity of heating increases from bottom to top, in the annealing channel from top to bottom. The glass in the prayer chamber receives a radiation maximum. At the same time, the following glasses are heated by radiation from the upper one. Such heating is optimal, since all the positions of the glass to the upper position are preliminary and serve to impart high uniformity and gradual heating. 1 il. Yo

Description

The invention relates to the field of production of curved sheet glass and can be used in factories of technical glass.

Specifically, the present invention relates to flow-type baking furnace designs used to produce curved sheet glass.

Bent flat glass is made by both vertical and horizontal methods of prayer. The peculiarity of its manufacturing process is that, after heating, the glass sheets undergo a polishing procedure, natural (under the weight of the sheet) or artificial, forced (pressing).

Glass grinding (bending) can be performed directly in heating furnaces or in special pressing mechanisms located after heating furnaces.

Prayer heating furnaces are generally horizontal.

The disadvantage is the horizontal placement of the heating and annealing zones, which are actually the most energy-intensive parts of the device. In addition to large size, it causes large heat loss, reducing the efficiency of heat treatment of glass.

The aim of the invention is to improve the quality of polishing.

The goal is achieved in such a way that in a device for grinding glass sheet containing a grinding furnace with heating, grinding and annealing zones and a transportation system, the heating and annealing zones are placed parallel to each other and made in the form of vertical shafts.

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heating and annealing zones in between.

The difference of the technical solution is that in it the heating and annealing zones are arranged in parallel and made in the form of vertical shafts. This provides the required compactness of the device, its small dimensions horizontally and the obvious possibility of reducing production space. In the prior art, the vertical arrangement concerns only the quenching zone, while the parallel placement of the heating and annealing zones is not used at all.

Another difference of the claimed device is that the highlighting zone is located above the heating and annealing zones in between. Under the conditions of the presence in such structures of upward heat fluxes, which in this case will somehow close in the zone of highlighting, this constructive method ensures the most efficient use of the heat of exhaust gases from the hottest zones of the furnace.

The present invention is illustrated in the drawing, which shows a cross-section of the device.

The device for flattening sheet glass contains a prayer furnace 1, which has a U-shaped structure and consists of a vertical heating channel 2, with standard side heaters (not shown), a horizontal prayer channel 3 and a vertical annealing channel 4. A roller table 5, fitted with a conventional drive (not shown in the drawing) and connecting the loading zone of the frame forms 7 with glass 8 to the zone 9 of unloading the finished product, is mounted under the prayer furnace 1. The heating channel 2 in the lower part has stops 10 for holding the frame molds and is equipped with a lift 11 located under the channel 2 coaxially with it. Channel 3 of the prayer is provided with ceiling heaters 12 and a roller table 13 for transporting frame molds 7 with glass 8 from the heating channel 2 to the annealing channel 4. The rollers 14 and 15, respectively, of the beginning and end of the roller table 13 are provided with a displacement mechanism (not shown in the drawing). At the bottom of the vertical annealing channel 4 there are movable stops 16, and below the annealing channel 4 a mechanism 17 is made. Control over the process of prayer is conducted through the viewing window 18.

The device works as follows.

In the loading zone 6, the glass 8 is mounted on the frame form 7, which is

on the roll table 3. The drive of the roll table 5 is turned on and the frame form 7 with glass 8 is moved under the vertical heating channel 2. Lift 11 is turned on, picks up

frame form 7 and pushes it into the vertical heating channel 2, which is filled with previously received frame forms 7 with glass 8. As soon as the top of the supplied frame form 7 touches the bottom

the frame with glass already located there, the stops 10 supporting the whole stack of frame forms 7 in the heating channel 2 are removed and the supplied frame form 7 is pushed into the channel 2. At the same time, the whole foot

frame forms in the heating channel 2 is held and moved by the lift 11. When the supplied frame form 7 enters the channel 2, the rollers 14 move back, making way for the heated upper frame form.

7 with glass 8, which, due to the raising of the foot of the framework forms, moves into the polishing channel 3. As soon as the lower plane of the upper frame form 7 is at the surface of the roller table 13, the movement

lift 11 stops, rollers 14 return to their place, and frame form 7 is mounted on them. The stops 10 also return to their place by partially blocking the opening of the heating channel 2.

The drive of the elevator 11 is turned on and the latter is lowered, the exit from the heating channel 2 and leaving a stack of frame forms in the channel. The bottom plane of the filed frame form 7 is then set to

stops 10. The drive of the roller table 13 is turned on and the frame form 7 with glass 8 moves in the polishing channel 3, in which the glass heats up to 640-710 ° C under the influence of heaters and is streamed

under its own weight. When the roller table 13 reaches the end, the frame 7 with the streaked glass stops (the drive of the roller table is turned off). The drive mechanism 17 removal, which is served

bottom to channel 4 annealing. The upper plane of the removal mechanism 7 approaches the lower plane of the lowermost frame form 7 located in the annealing channel 4, and, picking up the entire foot of the forms in the channel, lifts it

up to the contact with the frame form 7, located at the end of the roller table 13 of the channel 3 of prayer. The rollers 15 of the roller conveyor 13 are removed, the stops 16, which overlap the annealing channel 4 from below, are also removed and all

the foot of the frame forms 7 is lowered down on the removal mechanism until the lower frame form 7 with glass 8 is mounted on the rollers of the roller table 5. The stops 16 return to their original position, maintaining

frame foot in the channel

4 annealing, rollers 15 also occupy their original position. The drive of the roller table 5 is turned on and the frame form 7 with the finished glass is moved to the discharge zone 9, where the frame shape is freed from the glass, and empty along the roller table 5 returns to the load zone 6.

Characteristically, in this device, the heating of the glass in the channel 3 of prayer is not only due to radiation from heaters 12 located under the roof of the prayer furnace 1, but also due to heat from the side heaters in the heating channel 2, as warm air rushes upwards on channel 2, heat yourself and transfer your heat to frame forms 7 with glass 8. Cooling (annealing) the glasses in channel 4 of annealing will be cooled by sucking cold air through the open bottom of channel 4 of annealing.

The technical and economic advantage of the claimed device, as compared with the prototype, is its considerable cost-effectiveness, since there is practically no heat loss, all the heat is used to heat the glass in the prayer channel.

The technical and economic advantage of the claimed device, compared with the prototype, is its compactness,

connected with the use of small production areas. This is due to the fact that the heating and annealing sections are made in the vertical direction and

on the area defined by the size of one frame form, is placed a foot of forms. The same pattern is observed for the annealing section. Consequently, the length of such a prayer oven depends only on the length

The prayer area can ideally be reduced to the length of two frame forms, i.e., the highlighting can start in the heating channel and end in the annealing channel. In this case, the prayer oven may consist of two vertical channels separated by thermal insulation.

Claims (1)

Invention Formula A device for grinding sheet glass containing heating and annealing chambers, a grinding chamber between them, a transportation system and electric heaters, characterized in that In order to improve the quality of prayer, the heating and annealing chambers are made in the form of vertical shafts, and the prayer chamber is located in the upper ends of the horizontal heated channel connecting them. 18